• Tonight

    Aug 21

    Lo 73°

    Showers and a heavier t-storm

    Ragweed Pollen Weather
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
  • Fri

    Aug 22

    84°Lo 70°

    A couple of thunderstorms

    Moderate ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Sat

    Aug 23

    79°Lo 69°

    Clouds and sun with a t-storm

    Moderate ragweed pollen levels
    • Grass
      Pollen
      0 - Low
    • Ragweed
      Pollen
      30 - Moderate
    • Tree
      Pollen
      0 - Low
    more
  • Sun

    Aug 24

    83°Lo 72°

    Very warm with clouds and sun

    Moderate ragweed pollen levels
    • Precip
      25%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      50%
    more
  • Mon

    Aug 25

    84°Lo 70°

    A t-storm around in the p.m.

    Ragweed Pollen Weather
    • Precip
      40%
    • Wind
      Speed
      7 mph
    • Cloud
      Cover
      28%
    more
Next Previous
Hi 77° RealFeel® 85° Precipitation 90%

Day

N

E

S

W

  • SSW 6 mph
  • Gusts: 10 mph

Severe thunderstorms; mostly cloudy and humid

  • Max UV Index: 4 (Moderate)
  • Thunderstorms: 100%
  • Precipitation: 0.92 in
  • Rain: 0.92 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 6.5 hrs
  • Hours of Rain: 6.5 hrs
Lo 73° RealFeel® 72° Precipitation 60%

Night

N

E

S

W

  • SW 5 mph
  • Gusts: 11 mph

A couple of showers and a heavy t-storm; mostly cloudy, warm and humid; watch for flash flooding

  • Max UV Index: N/A
  • Thunderstorms: 60%
  • Precipitation: 0.72 in
  • Rain: 0.72 in
  • Snow: 0 in
  • Ice: 0 in
  • Hours of Precipitation: 3 hrs
  • Hours of Rain: 3 hrs

Chicago Pollen Levels - August 21

  • Extreme
  • Very High
  • High
  • Moderate
  • Low
  • Grass

    Pollen

    Low

  • Weed

    Pollen

    Moderate

  • Tree

    Pollen

    Low

  • Mold

    Pollen

    Low

Temperature History - Aug 21

more Historical Weather Data >
  Today Normal Record 8/21/2013
High 77° 82° N/A 88°
Low 73° 64° N/A 69°

Sunrise/Sunset

Sunrise / Sunset Illustration

Rises at 6:05 AM with 13:37 of sunlight, then sets at 7:42 PM

Moonrise/Moonset

Astronomy >
Moonrise / Moonset Illustration

Rises at 2:33 AM with 14:39 of moolight, then sets at 5:12 PM

Top Story

Chicago Weather Report

Chicago: Threat of Thunderstorms Lingers After Heavy Rains Flood Wrigley Field

August 21, 2014; 12:59 PM ET

While there may be a mix of sunshine and clouds over the area, Chicago is facing more rounds of thunderstorms over the next several days. more >

Thu. Pollen

Thu. Dust & Dander

Thu. Wind Maps